Single facer drive



5 Sheets-Sheet l E. L. MUMMA SINGLE FACER DRIVE June 17, 1952 Flled Oct 4, 1947 June 17, 1952 E. L. MUMMA 2,600,907

SINGLE PACER DRIVE Filed Oct. 4, 1947 3 Sheets-Sheet 2 HUN r FIELD LARqI. ac.

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SHUNT FIELD F/qt'j, 3mm

E/mer L. mum??? 0L June 17, 1952 E L. MUMMA SINGLE FACER DRIVE 3 Sheets-Sheet 5 Filed 00?.- 4, 1947 Patented June 17, 1952 UNITED STATES PATENT OFFICE 8 Claims. (Cl. 154-31) This invention relates to. an improvement on a single facer corrugating machine.

The usual single facer corrugating machine has two ccrrugating rolls one of which is power driven and the other of which is driven from the driven roll through means of the corrugations on both the rolls. Also such machines have a presser roll which carries the. liner into contact with the fluted strip, which has previously had adhesive applied to theprojections thereof, so that the presser roll presses the liner against these projections so that the two strips thereafter adhere together. The presser roll is usually driven through means of gears on it and on the adjacent driven corrugating roll. For a given thickness of stock thediameters of the corrugating roll and the adjacent presser roll can be so designed that this gear drive between them works perfectly. However, it is known that the stock varies in thickness and for this reason the presser roll had been made adjustable to and from the corrugating roll. No provision has been made to change the relative speeds of the two rolls because of this variation in thickness of stock. The fluted strip and liner are pressed so firmly between the driven corrugating roll and the presser roll that the surfaces. of these two rolls are virtually driven one from the other andwhen stock of a different thickness than that for which the diameters of the rolls and the initial gearing are designed is used on the machine the tendency is for the driven corrugating roll, through the stock, to drive the presser roll at a different speed than the speed that the gearing is designed to drive it. This causes a wearing of the gearing and a slippage and a corresponding imperfection in the stock or board Produced on the machine.

In the instant invention the presser roll is driven from an independent motor from that driving the corrugating roll and yet the motors driving the respective rolls are so interconnected that when the speedof the larger motor driving the corrugating roll is changed, the speed of the smaller motor driving the presser roll will correspondingly be changed.

The invention also contemplates means for changing the speed of the presser roll driving motor independently of the motor driving the corrugating roll.

Other objects and advantages of the invention will be apparent from the following description and the accompanying drawings forming a part hereof, and in which:

Figure 1 is a side elevational view of a single facer corrugating machine embodying, the improvements of this invention.

Figure 2 is avfragmentary, view; of the various driving. mechanisms employed.

Figure 3 is a side elevation of the separate driving ,motor for the presserroll.,

Figure is a fragmentary, end elevation showing the presser roll and the corrugating roll as theyv come together to permanently attach the liner to the fluted strip,

Figure 5 isadiagrammatic view of the drivingmechanism and circuit.-

Figure 6 is a fragmentary view of a possible modification of. thisdriving mechanism.

Inthe drawingssimilar numerals-refer to simi-- tric 1 and screw 8. Theprecise operation of this mechanism, forming no part of the present invention is shown in Patent No. 2,106,500, January- 25, 1938.

Lower corrugating roll 2 is; driven through meansof a motor 9 and gear reduction mechanism l0. Instead of driving the presser roll 6 from gears on roll 6 and roll 2, roll 6 is driven through a small separatemotor II. The rolls are driven through means of gears and chains from their respective motors.

Power is introduced to the corrugating unit through means of an alternating currentied to alternating current motor I2, the rotor of which is on the same shaft as the rotor of direct current generator [3, so that the motor operates the generator whenever the motor is operating, and through means of belt I4 driven from the same motor-generator shaft, exciter I5 is driven. Current from the exciter energizes the fields of motors 9 and II. Current from-theD. C. generator l3 energizes the rotors orarmaturesofthe motors 9 and H. A'rheostat IS- in; the field of the D. C. generator l3- maybe used to vary the supply of current ,to the armaturesof the motors 9 and II and thereby simultaneouslyvarytheir speed.

Ii desired a further rheostatll-may be used in thefield of the smallamotor I I l to independently,

vary its speed. Various control mechanisms in the circuit of the exciter are generally indicated at l8 and this mechanism is all old and forms no part of the instant invention.

From Figure 1 it will be apparent that as the strip 3 on roll 2 having had its corrugations made therein by means of rolls I and 2, and having had adhesive applied to the outer tips, as it comes into contact with liner 5 on roll 6 will tend to drive roll 6 from roll 2, if the diameters of the respective rolls and the initial setting of the respective drives is not exactly correct for the thickness of the two strips being used. Of course the more powerful drive imparted to roll 2 will tend to drive or hold back the weaker drive of roll 6. Since both large motor 9 and small motor l i are driven from the same current it will be apparent that changing that current will change their speeds proportionately so that the machine can put out the number of feet per minute required simply by changing the rheostat However, for a different total thickness of stock in the strips 3 and 5, different relative speeds of the rolls 2 and 5 would be preferred. However, since small motor ll takes its current from the same circuit as large motor 53, if motor ii is slowed down because of the surface drive of roll at a lower rate of speed, no harm will result to the circuit or the motor ii. If on the other hand, because of the surface speeds of the two rolls, roll 3 is driven faster than the original design intended so that small motor i l is correspondingly driven faster, then small motor I,

a D. C. motor will simply act as a generator and generate more power for the circuit and therefore for the large motor 9 and possibly even tend to increase the speed of large motor 9. Of ccurse this increase of speed could readily be slowed down, if not desired, by means or" rheostat If on the other hand, an accurate adjustment of the speed of the small motor H should be desired for every variation of thickness of stock, the rheostat ii could be used to independently adjust the speed of small D. C. motor i i.

There is thus shown a drive for the presser roll whic is independent of the drive of the corrugating machine proper and which yet may be adjusted in speed in unison with the large motor of the corrugator, because of taking current from the same D. C. generator, and yet the small motor may itself be adjusted in speed indendently of the of the large motor driving the machine.

With this structure there is no tendency of the surf ce speeds of the presser roll and adjacent corrugating roll working injuriously against the drive of the presser roll and also there is a comp e avoidance of injury to the board made on the mac ine because of this flexibility of the drive of the presser roll, which is substantially complete.

It will apparent that many modifications may be made in the drive of the presser roll and the other features disclosed without departing from the invention. 1

Cd hat is claimed as new and is desired to be secured by Letters Patent is:

1. In a corrugating machine having a pair of adjacent corrugating rolls adapted to flute stock strip passing therebetween, and a liner strip applying presser roll immediately adjacent one corrugating roll to apply a liner strip to one face of the fluted stock strip on the adjacent corrugating roll, the corrugated stock strip and liner strip each passing around a substantial proportion of the circumferences of the said one corrugating roll and presser roll respectively and then tightly between said rolls, whereby one of said rolls tends to be driven by the other and means to apply adhesive to the face of one of said strips facing the other said strip prior to their passage between said one corrugating roll and the presser roll, separate motors to drive said one corrugating roll and said presser roll, means interconnesting the power supply for said motors and means for simultaneously varying the speeds of said motors to vary to the same extent the speed of said one corrugating roll and said presser roll, both said driving motors operating on the rolls in addition to the rotary effect caused by the passage of the strips between the adjacent corrugating and presser rolls.

2. In a corrugating machine having a pair of adjacent corrugating rolls adapted to flute stock strip passing therebetween, and a liner strip applying presser roll immediately adjacent one corrugating roll to apply a liner strip to one face of the fluted stool; strip on the adjacent corrugating roll, the corrugated stock strip and liner strip each passing around a substantial proportion of the circumferences of the said one corrugating roll and presser roll respectively, and then tightly between said rolls, whereby one of said rolls tends to be driven by the other and means to apply adhesive to the face of one of said strips facing the other said strip prior to their passage between said one corrugating roll and the presser roll, separate motors to drive said one corrugating roll and said presser roll, means interconnecting the power supply for said motors and means for simultaneously varying the speeds of said motors to vary to the same extent the speed of said one corrugating roll and said presser roll, and. means including said adjacent rolls and strips, when the machine is in operation, to vary the power applied to one or" said motors upon a variation in the speed of the other motor.

3. The corrugating machine of claim 2 including means independent of the driving motor for the corrugating roll to vary the speed of the presser roll driving motor.

4. In a corrugating machine having a pair of adjacent corrugating rolls adapted to flute stock strip passing, therebetween, and a liner strip applying presser roll immediately adjacent one corrugating roll to apply a liner strip to one face of the fluted stock strip on the adjacent corrugating roll, the corrugated stock strip and liner strip each passing around a substantial proportion of the circumferences of the said one corrugating roll and presser roll respectively, and then tightly between said rolls, whereby one of said rolls tends to be driven by the other and means to apply adhesive to the face of one of said strips facing the other said strip prior to their passage between said one corrugating roll and the presser roll, an electric motor to drive said one corrugating roll, a separate electric motor to drive the presser roll, circuit means connecting said motors and a rheostat in said circuit to vary the speeds of the two motors in unison.

5. In a corrugating machine having a pair of adjacent corrugating rolls adapted to flute stock strip passing therebetween, and a liner strip applying presser roll immediately adjacent one corrugating roll to apply a liner strip to one face of the fluted stock strip on the adjacent corrugating roll, the corrugated stock strip and liner strip each passing around a substantial proportion of the circumferences of the said one corrugating roll and presser roll respectively, and then tight- 1y between said rolls, whereby one of said rolls tends to be driven by the other and means to apply adhesive to the face of one of said strips facing the other said strip prior to their passage between said one corrugating roll and the presser roll, two separate variable speed motors, one for driving said one corrugating roll and the other for driving said presser roll, means for simultaneously starting said motors, and means for simultaneously varying the speeds of said motors to maintain the same peripheral speeds of the presser roll and the adjacent corrugator roll.

6. In a corrugating machine having a pair or" adjacent corrugating rolls adapted to flute stock strip passing therebetween, and a liner strip applying presser roll immediately adjacent one corrugating roll to apply a iiiner to one face of the fluted stock strip on the adjacent corrugating roll, the corrugated stool: strip and liner strip each passing around a substantial proportion of the circumferences of the said one corrugatin roll and presser roll respectively, and then tightly between said rolls, whereby one of said, rolls tends to be driven by the other and means to apply adhesive to the face of one of said strips facing the other said strip prior to their passage be= tween said one corrugating roll and the presser roll, separate motors to drive said one corrugating roll and said presser roll, the motor driving the presser roli being substantially smaller than the motor driving the said presser roll and yielding to the drive of the presser roll the event of a diiierence in the surface speeds of the two separate motor driven rolls when in operation.

7. The corrugating machine of claim 6 including means to vary the speed in unison of said two driving motors for both said rolls.

8. The corrugating" machine of claim 6 including means te vary the speed of the presser roll driving" motor independently of the speed of the corrugating roli driving motor.

ELMER L, Militia IA,

E'QEFEEREIICES CITED The following references are of record in the file oi this patent:

UNITED STATES PATENTS Nuinl-er Name Date 252,54? Thompson Jan. 17, 1832 1,987,676 Drake Jan 15, 1935 2,068,155 Swift Jan. 19, 1937 2,2893% Greenwood July i l, 1942 2,399,661. Schindler r- Nov. 27, 1945 2,413,409 i itehett Dec. 31, 1946 2,482,627 Langston Sept. 2S, 1949 

